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Effects of Niobium and Vanadium on the Properties of Porous TiMoCuAg High-Entropy Alloys

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Title Effects of Niobium and Vanadium on the Properties of Porous TiMoCuAg High-Entropy Alloys
 
Creator Gaber, Ghalia A
Mohamed, Lamiaa Z
Elkady, Omayma A
Elsayed, Ayman H
Abolkassem, Shimaa A
 
Subject High entropy alloys
TiMoCuAgV HEA
TiMoCuAgNb HEA
Hardness
Microstructure
 
Description 743-758
Powder metallurgy was used to create porous TiMoCuAgV HEA (VHEA) and TiMoCuAgNb HEA (NbHEA) using 0, 10, and 20 wt.% from ammonium hydrogen carbonates (AHCs) as a space holding material. Samples were mixed with AHCs as a foaming agent. All samples were compacted at 400 MPa and sintered at 1250oC. X-ray diffraction, scanning electron microscopy, and energy dispersive analyses were performed for phase identification, microstructure observation, and elemental composition, respectively. Fabricated HEAs density values were estimated according to Archimedes' principle. Also, hardness and Young's modulus were determined. The addition of vanadium (V) was shown to exceed that of niobium (Nb) in increasing the HEA Young's modulus without AHCs. The corrosion characteristics of the prepared HEAs in corrosive media were estimated by the weight loss (WL) method, indicating good improvement by adding either V or Nb. The findings showed that the 10-NbHEAs in SBF had the highest improvement values, where the CR value was 0.94 mm/y lower than other investigated media. Additionally, 10-VHEAs in a simulated body fluid solution (SBF) and hydroxyapatite (HA) corroded more rapidly than 10-NbHEAs. After the corrosion test, the surface morphology showed a protective layer for 10-NbHEAs in SBF media. Also, the surface morphology is well-defined as smooth and uniform in HA media for 10-NbHEAs and 20-NbHEAs, which agrees with WL and corrosion rate values. Generally, VHEAs have higher corrosion resistance than NbHEAs.
 
Date 2024-09-17T11:25:30Z
2024-09-17T11:25:30Z
2024-09
 
Type Article
 
Identifier 0975-0959 (Online); 0301-1208 (Print)
http://nopr.niscpr.res.in/handle/123456789/64548
https://doi.org/10.56042/ijpap.v62i9.11602
 
Language en
 
Publisher NIScPR-CSIR,India
 
Source IJPAP Vol.62(09) [September 2024]